#!/usr/bin/env python3
"""
CLI entry point: cross-reference comparison.json against the file server and
report which required mods are missing.

Usage:
    python report_missing.py
"""

import json
import sys

from arma_modlist_tools.compat import fix_console_encoding
from arma_modlist_tools.config import load_config
from arma_modlist_tools.fetcher import build_server_index
from arma_modlist_tools.reporter import build_missing_report, save_missing_report

fix_console_encoding()


def main() -> None:
    cfg = load_config()

    if not cfg.comparison.exists():
        print(f"ERROR: {cfg.comparison} not found. Run compare_modlists.py first.")
        sys.exit(1)

    comparison = json.loads(cfg.comparison.read_text(encoding="utf-8"))
    total_mods = (
        comparison["shared"]["mod_count"]
        + sum(d["mod_count"] for d in comparison["unique"].values())
    )

    # ---- Build server index ----
    print(f"\nChecking server index...")
    index = build_server_index(cfg.server_url, cfg.server_auth)
    print(f"  {len(index['by_steam_id'])} mods indexed\n")

    # ---- Build report ----
    print(f"Cross-referencing {total_mods} required mods...")
    report = build_missing_report(comparison, index)
    save_missing_report(report, cfg.missing_report)

    # ---- Print table ----
    missing = report["missing_mods"]
    if missing:
        print(f"\n  Missing from server ({len(missing)}):\n")
        print(f"  {'steam_id':<14}  {'Group':<28}  Name")
        print(f"  {'-'*14}  {'-'*28}  {'-'*40}")
        for m in missing:
            sid   = m["steam_id"] or "---"
            group = m["group"]
            print(f"  {sid:<14}  {group:<28}  {m['name']}")
    else:
        print("\n  All required mods are on the server.")

    print()
    print(f"  {report['on_server']} / {report['total_mods']} found on server")
    print(f"  Report saved: {cfg.missing_report}")
    print()


if __name__ == "__main__":
    main()